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3 years ago

Which is the balanced equation for: Al2O3 + Fe – Fe3O4 + AL

Chemistry

1 answer:

Sloan [31]3 years ago

6 0

Answer:

4Al203 + 9Fe -> 3Fe3O4 + 8Al

Amount of Al on reactant side: 8

Amount of Al on product side: 8

Amount of O on reactant side: 12

Amount of O on product side: 12

Amount of Fe on reactant side: 9

Amount of Fe on product side: 9

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A bike tire at a pressure of 2.4 atm and a

hjlf

Answer:

5.4 atm

Explanation:

P•V/T = P'•V'/T'

2.4•2.2/290 = P'•2/296

5.28/290 = P'/296 Multiply both sides by 296

1562.88/290 = P'

I'm = 5.4 atm

3 0

3 years ago

Why are the seasons for the southern hemisphere reversed from the northern hemisphere

MArishka [77]

Becuse the earth rotates the opisate way on the other side of the equator forgive me if im wrong.

5 0

4 years ago

Halocarbons contain carbon, hydrogen, and atoms from which set of elements?

Mnenie [13.5K]

Key word is “halo”, as in “halogens”. The halogens are group 7 on the periodic table, which includes Florine, Chlorine, Bromine, and Iodine

Answer is 4.

5 0

4 years ago

Calculate the vapor pressure (in torr) at 298 K in a solution prepared by dissolving 38.5 g of the non-volatile non-electrolye u

Free_Kalibri [48]

Answer: The vapor pressure of methanol solution at 298K is 107.12 torr

Explanation:

As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

The formula for relative lowering of vapor pressure will be,

$\frac{p^o-p_s}{p^o}=i\times x_2$

where,

$\frac{p^o-p_s}{p^o}$ = relative lowering in vapor pressure

i = Van'T Hoff factor = 1 (for non electrolytes)

$x_2$ = mole fraction of solute = $\frac{\text {moles of solute}}{\text {total moles}}$

Given : 38.5 g of urea is present in 142 g of methanol

moles of solute (urea) = $\frac{\text{Given mass}}{\text {Molar mass}}=\frac{38.5g}{60g/mol}=0.64moles$

moles of solvent (methanol) = $\frac{\text{Given mass}}{\text {Molar mass}}=\frac{142g}{32g/mol}=4.4moles$

Total moles = moles of solute + moles of solvent = 0.64 + 4.4 = 5.04

$x_2$ = mole fraction of solute = $\frac{0.64}{5.04}=0.127$

$\frac{122.7-p_s}{122.7}=1\times 0.127$

$p_s=107.12torr$

Thus the vapor pressure of methanol solution at 298K is 107.12 torr

3 0

3 years ago

What does resonance result in?

Tcecarenko [31]

louder sounds

Explanation:

Resonance results in louder sounds.

Resonance is a phenomenon that produces a large vibration as a result of smaller vibration that causes the resonating body to vibrate at its own natural frequency.

Resonance results in sound amplification and causes louder sounds. Increasing vibration results in the production of a louder sound.

Learn more:

Resonance in chemistry brainly.com/question/9422880

#learnwithBrainly

3 0

3 years ago